hi. glad to report all is well with lpg system (astravan factory fit koltec multipoint) and i'm getting 300 miles to £30 is this about right? Also, any idea why the speedo has packed in? its messing up my obsession with mpg

I get 281miles out of £32 from a 1.4.I think it should do better though.

At 75p a litre that's 42.6 litres or 9.4 gallons. So 281 miles works out at 29 mpg. Taking into account that you'll always use a bit more gas than petrol, that's roughly equivalent consumption to 35 mpg on petrol. Not brilliant but not too bad.

G'day,The 281 miles was done on 40.13litres of gas. Worked out at 31.8MPG.Following some fiddling with mixture adjustments etc i have now got it to 33.4mpg on gas.At least it is going in the right direction.Have recieved a link on another post here to a site with some tips on tuning so will have a go at that and see what further improvements I can get.Thanks,Simon

So your maths were pretty spot on. Bearing in mind the usual difference due to the lower calorific value of LPG over petrol and that means it is the equivalent to around 38.135 mpg on petrol. Does that sound about right?

Or, put it another way, 300 miles for £30 is 10p per mile compared with 300 miles at 38.135 mpg on petrol at £1.35 a litre is 16p per mile. giving you the eqivalent running costs of 50.85 mpg on petrol.

Have lost the plot on the maths lol (too tired lol) but i normally chuck in around 45litres and get between 200 - 250 miles (urban - mway) which i think on a singlepoint V6 is good enough, on petrol i would usually get 300 - 350 miles out of 55litres

Have lost the plot on the maths lol (too tired lol) but i normally chuck in around 45litres and get between 200 - 250 miles (urban - mway) which i think on a singlepoint V6 is good enough, on petrol i would usually get 300 - 350 miles out of 55litres

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